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- W3100236957 abstract "The intrinsic Ly? emission lines of normal galaxies before reionization are much absorbed by the damping wing of the Gunn-Peterson trough, rendering their direct detection nearly impossible, if their intrinsic line widths are less than ~100 km s-1. High-redshift luminous quasars prior to the completion of cosmological reionization at z ~ 6, on the other hand, are capable of producing large H II regions around them (Str?mgren spheres) to allow their intrinsic Ly? emission lines to be transmitted without overwhelming absorption (Cen & Haiman). We suggest that targeted observations at the Str?mgren spheres of known luminous quasars at z ? 6 would be able to detect Ly? emission lines of galaxies inside the Str?mgren spheres largely unattenuated. A tunable, very narrowband filter of ~ 0.1% or a narrowband filter of ~ 1% with follow-up spectroscopic identifications will be required. Such observations could directly observe the sources of cosmological reionization including possibly the Population III galaxies at z = 6-20 by the James Webb Space Telescope. Possible applications include determinations of the ionization state of the intergalactic medium, the sizes of the Str?mgren spheres, the ages of the quasars, the luminosity function of high-redshift galaxies and its evolution, the spatial distribution of galaxies and its evolution, the biased distribution of galaxies around quasars, and the anisotropy of quasar emission. Observations using Keck-class telescopes may already be made to enable a differentiation between a fully neutral and a 10% neutral intergalactic medium at z > 6." @default.
- W3100236957 created "2020-11-23" @default.
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- W3100236957 date "2003-10-09" @default.
- W3100236957 modified "2023-09-26" @default.
- W3100236957 title "Galaxies inside Strmgren Spheres of Luminous Quasars at <i>z</i> >6: Detection of the First Galaxies" @default.
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- W3100236957 doi "https://doi.org/10.1086/379597" @default.
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